Fuse puller



Dec. 31, 1929. V R. 1?' BROWN 1,741,222 I FUSE FULLER Filed uarch 17, 1927 Inventor- Rug F. Brown His Akbar-neg Patented Dec. 31, 1929 UNETED STATES PATENT QFFE'CE RAY F. BROWN, OF LYNN, MASSACHUSETTS, ASSIGNQR TO GENERAL ELECTRIC COMPANY, A COBLPORATIQN OF NEW YORK FUSE FULLER Application filed March 17, 1927.

The present invention relates to electric protective devices, and more especially to fuse pullers by means of which an electric fuse may be removed from and replaced in 3ircuit with safety to the operator.

The object of my invention is the provision of an improved fuse puller which is adapted to be easily connected to an electric fuse and securely retain the detached fuse, which shall be of sturdy construction and at the same time adapted for application to fuses installed in cut-out blocks with small clearances and which may be economically manufactured.

One embodiment of my invention is shown in the accon'ipanying drawing, in which Fig. 1 is a perspective view of an enclosed cut-out block for high potential fuses; Fig. 2 is a similar view of the fuse puller; Fig. 3 is a similar view of a second form of cut-out block with its cover engaged by the puller and partly detached; Fig. 4; shows the fuse engaged by the puller; and Fig. 5 shows the cover of the cut-out block detached.

It is the practice at the present time to install potential fuses on enclosed cut-out blocks or boxes 1 in order that the highly electrified metal clips or parts 2 may be housed against possible contact by persons or other metal parts, and it is also common practice to make such cut-out blocks very narrow to conserve space on the switchboard or panel on which they are mounted, with the result that the clearance spaces between the sides of an installed fuse 3 and the inner walls of the cut-out block are very narrow.

My fuse puller, in order to meet this prac tical situation, consists of an insulating handle 4: with its operative end 5 made square and of a thickness corresponding approximately to that of the diameter of the fuse 3, and two flat metal blades 6 secured by rivets at their rear ends to opposite sides of the handle end 5. The blades are thus spaced apart so that their free ends are adapted to straddle the fuse and enter the narrow clearances between it and the inner walls of the block 1. The free ends of the blades 6 are respectively provided with oppositely-directed hooks 7, whereby upon giving the handle Serial No. 176,224.

a slight turn they are moved beneath the use 3 and an outward pull upon the handle erves to detach the latter.

in order that the detached fuse may be fri tirinally retained by the hooks 7, I provide a spring 8 in a recess in the end of the iandle and projecting therefrom sufficiently engage and be somewhat compressed by the side of the fuse when the hooks 7 are in engagement therewith.

The puller is also adapted for removing and replacing the. covers 9 of the cut-out blocks 1. [1 cover comprises an insulating slab 10 corresponding to the size of the cutout block 1, as shown either in Fig. 1 or Fig. 3, and is provided on its outer side with a cylindrical knob or handle 11 of substantially the same diameter as the fuse 3, while on its inner side are two spring arms 12 adapted to engage the lugs 13 carried by the usual fuse contact clips 2 when in assembled relation with the block 1.

While I have shown and described the best embodiment of the invention known to me, I do not desire to be restricted thereto.

What I claim as new and desire to secure by Letters Patent of the United States, is 1- A fuse puller comprising an insulating handle provided with a recess in one end, a spring seated in said recess and projecting therefrom, two metal blades provided with oppositely-directed hooks secured to opposite sides of said handle and projecting beyond the end thereof.

In witness whereof, I have hereunto set my hand this 15th day of March, 1927.

RAY F. BROWVN. 

